import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;

class Main {
    public static void main(String[] args) {
        System.out.println(OffsetDateTime.parse(
            "2013-12-21T18:30:00+0100", 
            DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssZ")
        ).toLocalTime());
    }
}